[PATCH v2 2/5] dmaengine: sprd: Define the DMA data width type

Baolin Wang
2018-04-19T02:01:42Z

Define the DMA data width type to make code more readable.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
---
Changes since v1:
- No updates.
---
drivers/dma/sprd-dma.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c
index dcfa417..65ff0a58 100644
--- a/drivers/dma/sprd-dma.c
+++ b/drivers/dma/sprd-dma.c
@@ -176,6 +176,14 @@ enum sprd_dma_int_type {
SPRD_DMA_CFGERR_INT,
};

+/* dma data width values */
+enum sprd_dma_datawidth {
+ SPRD_DMA_DATAWIDTH_1_BYTE,
+ SPRD_DMA_DATAWIDTH_2_BYTES,
+ SPRD_DMA_DATAWIDTH_4_BYTES,
+ SPRD_DMA_DATAWIDTH_8_BYTES,
+};
+
/* dma channel hardware configuration */
struct sprd_dma_chn_hw {
u32 pause;
@@ -604,15 +612,15 @@ static int sprd_dma_config(struct dma_chan *chan, struct sprd_dma_desc *sdesc,
u32 fix_mode = 0, fix_en = 0;

if (IS_ALIGNED(len, 4)) {
- datawidth = 2;
+ datawidth = SPRD_DMA_DATAWIDTH_4_BYTES;
src_step = SPRD_DMA_WORD_STEP;
des_step = SPRD_DMA_WORD_STEP;
} else if (IS_ALIGNED(len, 2)) {
- datawidth = 1;
+ datawidth = SPRD_DMA_DATAWIDTH_2_BYTES;
src_step = SPRD_DMA_SHORT_STEP;
des_step = SPRD_DMA_SHORT_STEP;
} else {
- datawidth = 0;
+ datawidth = SPRD_DMA_DATAWIDTH_1_BYTE;
src_step = SPRD_DMA_BYTE_STEP;
des_step = SPRD_DMA_BYTE_STEP;
}
--
1.7.9.5